Microsoft recently released a free app called Office Mobile for iPhone and Android. But there's a big, fat catch. While the app itself is free, it only works if you have a subscription to Microsoft's Office cloud app, Office 365.

But there's another way for you to get Office Mobile without having to buy your own subscription. If your company uses Office 365, you can use Mobile with that corporate account.

Chances are, your company doesn't use Office 365 yet. Compared to how many companies use regular versions of Microsoft Office, not that many use Office 365.

However, Microsoft just made it a lot cheaper for companies to get Office 365. On August 1, Microsoft changed a rule in its enterprise license agreement that allows them to simply tack on Office 365 to an existing license, and, typically, pay a discounted price for it, too, Blake Gollnick who works for Microsoft reseller SHI explained in a blog post.

In the past, Microsoft made it harder for companies to put Microsoft software on non-Windows devices. It charged them a special fee for that. Not so in this case. If your company uses Office 365, it includes Mobile app on iPhone or Android for free, a Microsoft spokesperson told us.

It's not 100% free for your company to give you Office 365. But if you need Office on your phone for your job, talk to your IT department. With enough requests, that might be the easiest, cheapest solution for you.